Fix incorrect `ConfigureAwait` specification causing stalled test
Fix incorrect `ConfigureAwait` specification causing stalled test

This only occurs on upcoming changes I have (occurred when switching
existing skin import tests across to realm). Unsure why it was set to
`true`, seems like a weird oversight.

NeoAdonis/osu,ppy/osu,peppy/osu,peppy/osu,ppy/osu,NeoAdonis/osu,NeoAdonis/osu,peppy/osu,ppy/osu